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Earth, observed
The Earth Observatory is a website run by NASA's Earth Observing System Project Science Office (EOSPSO). Bringing together imagery from many different satellites and astronaut missions, the website publishes fantastic images with highly detailed descriptions, feature articles and more. Gathered here are some standout photographs from the collections in the Earth Observatory over the past several years. For more images and information, please visit the Earth Observatory site itself.
The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite captured this image of a dust storm as it swirled over China in April of 2001. A strong temperate cyclone spun counter-clockwise over China, pushing a wall of dust as it moved. The deep tan dust is not only thick enough to completely hide much of the land surface below, but it almost forms its own topography, with ridges of dust rising up below the clouds. The spiral arms of white cloud are approximately 200km wide. (NASA/Jesse Allen, Robert Simmon/MODIS science team)
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The Bear Glacier on the Kenai Peninsula along the Gulf of Alaska seen by the IKONOS satellite took this on August 8, 2005. This image shows the ablation zone where the glacier is primarily losing ice. Upslope from the lake, the foot of the glacier is riddled with crevasses - cracks in the ice caused by the glacier's movement over a rough surface. Down the middle of the glacier run dark gray stripes. As a glacier moves, it picks up dirt and debris from the rocks it passes. When two glaciers merge, as they have here, the dirt and debris they carry form parallel stripes, or medial moraines, on the ice surface. (IKONOS satellite image courtesy GeoEye)
South of Khartoum, Sudan, where the White and Blue Nile Rivers join, a dizzying arrangement of irrigated fields stretches out across the state of El Gezira. The several bare-looking patches are small villages. This image was captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite on December 25, 2006. (NASA/GSFC/METI/ ERSDAC/JAROS, U.S./Japan ASTER Science Team)
Earth, observed
The Earth Observatory is a website run by NASA's Earth Observing System Project Science Office (EOSPSO). Bringing together imagery from many different satellites and astronaut missions, the website publishes fantastic images with highly detailed descriptions, feature articles and more. Gathered here are some standout photographs from the collections in the Earth Observatory over the past several years. For more images and information, please visit the Earth Observatory site itself.
The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite captured this image of a dust storm as it swirled over China in April of 2001. A strong temperate cyclone spun counter-clockwise over China, pushing a wall of dust as it moved. The deep tan dust is not only thick enough to completely hide much of the land surface below, but it almost forms its own topography, with ridges of dust rising up below the clouds. The spiral arms of white cloud are approximately 200km wide. (NASA/Jesse Allen, Robert Simmon/MODIS science team)
The Bear Glacier on the Kenai Peninsula along the Gulf of Alaska seen by the IKONOS satellite took this on August 8, 2005. This image shows the ablation zone where the glacier is primarily losing ice. Upslope from the lake, the foot of the glacier is riddled with crevasses - cracks in the ice caused by the glacier's movement over a rough surface. Down the middle of the glacier run dark gray stripes. As a glacier moves, it picks up dirt and debris from the rocks it passes. When two glaciers merge, as they have here, the dirt and debris they carry form parallel stripes, or medial moraines, on the ice surface. (IKONOS satellite image courtesy GeoEye)
South of Khartoum, Sudan, where the White and Blue Nile Rivers join, a dizzying arrangement of irrigated fields stretches out across the state of El Gezira. The several bare-looking patches are small villages. This image was captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite on December 25, 2006. (NASA/GSFC/METI/ ERSDAC/JAROS, U.S./Japan ASTER Science Team)
Deep in the Sahara Desert lies this crater. Nearly a perfect circle, it is 1.9 kilometers (1.2 miles) wide, and sports a rim 100 meters (330 feet) high. The crater sits in a vast plain of rocks so ancient they were deposited hundreds of millions of years before the first dinosaurs walked the Earth. Modern geologists long debated what caused this crater, some of them favoring a volcano. But closer examination of the structure revealed that the crater's hardened "lava" was actually rock that had melted from a meteorite impact. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite captured this image of Tenoumer Crater in Mauritania on January 24, 2008. (NASA,Jesse Allen, NASA/GSFC/METI/ ERSDAC/JAROS, U.S./Japan ASTER Science Team)
Cloudless skies allowed a clear view of Tibet in mid-December 2008. The Moderate Resolution Imaging Spectroradiometer (MODIS) flying onboard NASA's Terra satellite captured this true-color, image on December 18, 2008. Snow caps some mountain peaks, and ice partially covers some lakes in this high-altitude region, nicknamed the "Roof of the World." (NASA/Jeff Schmaltz, MODIS Rapid Response Team, Goddard Space Flight Center)
Sidi Toui National Park, in the southern half of Tunisia, close to the Libyan border, viewed by the Enhanced Thematic Mapper Plus (ETM+) instrument on NASA's Landsat 7 satellite on December 13, 1999. Native vegetation can be seen returning inside the borders of this protected park (approx. 7 kilometers wide), established in 1993 to protect the region against desertification. The effects of continued agriculture, overgrazing and drought can be seen on the surrounding arid landscape. (NASA/Jesse Allen/Landsat, USGS)
Two cyclones are seen, after forming in tandem in November 2006. The Moderate Resolution Imaging Spectroradiometer (MODIS) onboard NASA's Terra satellite took this picture of the two cyclones south of Iceland on November 20 (South is up in image). (NASA/Jesse Allen, Earth Observatory)
Even the most snow-covered place on Earth has patches of snow-free ground. In Antarctica, a series of parallel valleys lie between the Ross Sea and the East Antarctic Ice Sheet. Known as the Dry Valleys, they are swept free of snow by nearly relentless katabatic winds - cold, dry air that rolls downhill toward the sea from the high altitudes of the ice sheet. The Dry Valleys harbor a collection of glaciers and ice-covered lakes. This false-color image was captured by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on NASA's Terra satellite on November 29, 2000. (NASA/Jesse Allen, NASA/GSFC/METI/ ERSDAC/JAROS, U.S./Japan ASTER Science Team)
Roughly 480 by 320 kilometers, Dasht-e Lut is a large salt desert in southeastern Iran. This natural-color image, captured by the ASTER on NASA's Terra satellite shows part of the southeastern portion of Dasht-e Lut on May 13, 2006. This area consists of sand, and it contains some of the world's tallest dunes, some reaching a height of 300 meters (1,000 feet). 9NASA/Jesse Allen, Earth Observatory, NASA/GSFC/MITI/ ERSDAC/JAROS, U.S./Japan ASTER Science Team)
2008 Dr. Cheng-Chien Liu, National Cheng-Kung University and Dr. An-Ming Wu, National Space Organization, Taiwan)
